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8. INSTALLATION INSTRUCTIONS
8-1. Installation Site Selection
Maximum Allowable Tubing Length(L)and Elevation
Difference(H).
The Multi-Split System outdoor unit should be installed as
close to the indoor units as possible. Maximum allowable
length of the refrigerant tubing and elevation difference
between outdoor and indoor units are shown in Table 1.
Table 1
Max allowable
tubing length
at shipment.(m)
7.5
* If total tubing length becomes 7.5 to 15 m (max.),charge additional refrigerant (R22) by 15 g / m.
No additional charge of compressor oil is necessary.
Indoor Unit
WARNING
AVOID:
direct sunlight.
nearby heat sources that may affect performance of
the unit.
areas where leakage of flammable gas may be expect-
ed.
places where large amounts of oil mist exist.
DO:
select an appropriate position from which every corner
of the room can be uniformly air-conditioned. (High on
a wall is best)
select a location that will hold the weight of the unit.
select a location where tubing and drain pipe have the
shortest run to the outside.
allow room for operation and maintenance as well as
unrestricted air flow around the unit. (Fig. 2a)
Limit tubing length (L).
(m)
15
To prevent abnormal heat gen-
eration and the possibility of
fire, don't place obstacles,
enclosures and grilles in front
of or surrounding the air condi-
tioner in a way that may block
air flow.
Less than elevation
difference (H) between
the 2 units
Limit of elevation
Required amount of
difference (H).
(m)
7
Wall-Mounted Type
Wall-mounted Type
5 cm
min.
For stable operation of
the air conditioner, do not
install wall-mounted type
indoor units less than
1.5m from floor level.
15
Tubing length (L)
INDOOR
UNIT
OUTDOOR
UNIT
Fig. 1
additional
refrigerant*(g/m)
15
5 cm min.
INDOOR UNIT
Front View
Front View
Fig.2a
CAUTION
Minimum height
from floor level
Floor level
Fig. 2b
5 cm
min.
Indoor Unit
Wall
1.5m
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